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Article

Impact of Iron on the Fe–Co–Ni Ternary Nanocomposites Structural and Magnetic Features Obtained via Chemical Precipitation Followed by Reduction Process for Various Magnetically Coupled Devices Applications

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Department of Functional Nanosystems and High-Temperature Materials, National University of Science and Technology “MISiS”, 119049 Moscow, Russia
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Department of Materials Science and Engineering, Le Quy Don Technical University, Hanoi 100000, Vietnam
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Biosensor Research Institute, Department of Fine Chemistry, Seoul National University of Science and Technology (Seoul Tech), Seoul 01811, Korea
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Institute of Research and Development, Duy Tan University, Danang 550000, Vietnam
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Institute of Technology, Hanoi 100000, Vietnam
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Faculty of Physics, Lomonosov Moscow State University, GSP-1, Leninskie Gory, 119991 Moscow, Russia
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Engineering Centre, Plekhanov Russian University of Economics, Moscow 117997, Russia
*
Authors to whom correspondence should be addressed.
Academic Editor: Muralidharan Paramsothy
Nanomaterials 2021, 11(2), 341; https://doi.org/10.3390/nano11020341
Received: 8 January 2021 / Revised: 24 January 2021 / Accepted: 24 January 2021 / Published: 29 January 2021
This paper presents the synthesis of Fe–Co–Ni nanocomposites by chemical precipitation, followed by a reduction process. It was found that the influence of the chemical composition and reduction temperature greatly alters the phase formation, its structures, particle size distribution, and magnetic properties of Fe–Co–Ni nanocomposites. The initial hydroxides of Fe–Co–Ni combinations were prepared by the co-precipitation method from nitrate precursors and precipitated using alkali. The reduction process was carried out by hydrogen in the temperature range of 300–500 °C under isothermal conditions. The nanocomposites had metallic and intermetallic phases with different lattice parameter values due to the increase in Fe content. In this paper, we showed that the values of the magnetic parameters of nanocomposites can be controlled in the ranges of MS = 7.6–192.5 Am2/kg, Mr = 0.4–39.7 Am2/kg, Mr/Ms = 0.02–0.32, and HcM = 4.72–60.68 kA/m by regulating the composition and reduction temperature of the Fe–Co–Ni composites. Due to the reduction process, drastic variations in the magnetic features result from the intermetallic and metallic face formation. The variation in magnetic characteristics is guided by the reduction degree, particle size growth, and crystallinity enhancement. Moreover, the reduction of the surface spins fraction of the nanocomposites under their growth induced an increase in the saturation magnetization. This is the first report where the influence of Fe content on the Fe–Co–Ni ternary system phase content and magnetic properties was evaluated. The Fe–Co–Ni ternary nanocomposites obtained by co-precipitation, followed by the hydrogen reduction led to the formation of better magnetic materials for various magnetically coupled device applications. View Full-Text
Keywords: Fe–Co–Ni nanocomposites; ternary nanocomposites; chemical precipitation; magnetic materials Fe–Co–Ni nanocomposites; ternary nanocomposites; chemical precipitation; magnetic materials
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MDPI and ACS Style

Nguyen, T.H.; Karunakaran, G.; Konyukhov, Y.V.; Minh, N.V.; Karpenkov, D.Y.; Burmistrov, I.N. Impact of Iron on the Fe–Co–Ni Ternary Nanocomposites Structural and Magnetic Features Obtained via Chemical Precipitation Followed by Reduction Process for Various Magnetically Coupled Devices Applications. Nanomaterials 2021, 11, 341. https://doi.org/10.3390/nano11020341

AMA Style

Nguyen TH, Karunakaran G, Konyukhov YV, Minh NV, Karpenkov DY, Burmistrov IN. Impact of Iron on the Fe–Co–Ni Ternary Nanocomposites Structural and Magnetic Features Obtained via Chemical Precipitation Followed by Reduction Process for Various Magnetically Coupled Devices Applications. Nanomaterials. 2021; 11(2):341. https://doi.org/10.3390/nano11020341

Chicago/Turabian Style

Nguyen, Tien H., Gopalu Karunakaran, Yu.V. Konyukhov, Nguyen V. Minh, D.Yu. Karpenkov, and I.N. Burmistrov 2021. "Impact of Iron on the Fe–Co–Ni Ternary Nanocomposites Structural and Magnetic Features Obtained via Chemical Precipitation Followed by Reduction Process for Various Magnetically Coupled Devices Applications" Nanomaterials 11, no. 2: 341. https://doi.org/10.3390/nano11020341

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